dual stack / Delete IPv6 Subnet And Check IPv4 datapath / ipv4 does not work after

setup

create a router with 2 subnets, and one VM

that VM is dual stack ( like the router)

check that VM is reachable in both ipv4 and ipv6

delete subnet ipv6 from router

observation

check that ipv4 connectivity is still ok. it fails

https://logs.opendaylight.org/sandbox/vex-yul-odl-jenkins-2/netvirt-csit-1node-openstack-ocata-gate-stateful-oxygen/1/log_03_vpn_basic_dualstack_one_router.html.gz